13331020202121 has 4 divisors (see below), whose sum is σ = 17774693602832. Its totient is φ = 8887346801412.

The previous prime is 13331020202117. The next prime is 13331020202141. The reversal of 13331020202121 is 12120202013331.

13331020202121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 13331020202121 - 2² = 13331020202117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13331020202141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2221836700351 + ... + 2221836700356.

It is an arithmetic number, because the mean of its divisors is an integer number (4443673400708).

Almost surely, 2^{13331020202121} is an apocalyptic number.

It is an amenable number.

13331020202121 is a deficient number, since it is larger than the sum of its proper divisors (4443673400711).

13331020202121 is an equidigital number, since it uses as much as digits as its factorization.

13331020202121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4443673400710.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 13331020202121 its reverse (12120202013331), we get a palindrome (25451222215452).

The spelling of 13331020202121 in words is "thirteen trillion, three hundred thirty-one billion, twenty million, two hundred two thousand, one hundred twenty-one".